Table 2.

Dose distribution.

Variables	IG-IMRT (n = 45)	3D-CRT (n = 45)	P value
RT dose (Gy)
Average	53.70 ± 6.88	54.74 ± 5.56	0.427
BED average	69.38 ± 10.59	63.96 ± 6.44	0.004
RT fraction (Fx)	17.00 ± 5.35	27.18 ± 3.14	0.001
Dose to liver
V5 (%)	71.20 ± 17.45	58.02 ± 17.69	0.001
V10 (%)	55.78 ± 19.60	50.09 ± 15.46	0.116
V20 (%)	35.96 ± 17.58	37.69 ± 12.25	0.595
V30 (%)	23.67 ± 14.71	28.58 ± 11.01	0.079
MDTNLa (cGy)	1797.73 ± 728.36	1837.64 ± 548.34	0.768

^aMean dose to normal liver (MDTNL) was defined as the mean dose to the whole liver minus the GTV.